Title:
TEMPERATURE-RESPONSIVE HYDROGEL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2018/164003
Kind Code:
A1
Abstract:
[Problem] To provide a temperature-responsive hydrogel by means of a simple method (mixing), said temperature-responsive hydrogel having a feature such that the viscosity thereof is high at high temperatures but low at low temperatures.
[Solution] It is found that a temperature-responsive hydrogel which has high viscosity at high temperatures and low viscosity at low temperatures, while having a high (viscosity at high temperatures)/(viscosity at low temperatures) ratio, is able to be obtained by a method for mixing an aqueous solution containing a polyalkylene glycol (A) that has a weight average molecular weight of from 20,000 to 10,000,000 and an aqueous solution containing a silicate (B) within a specific component composition range, specifically at a mass concentration of A of 0.01-1.5% by mass, preferably at a mass concentration of A of 0.1-0.4% by mass and at a mass concentration of B of 0.5-10% by mass, preferably at a mass concentration of B of 1-5% by mass, with the mass ratio R of A to B (R = (mass of A)/(mass of B)) being within the range of from 0.01 to 0.5; and this finding led to the completion of the present invention.
Inventors:
KUDO YOSHIHIRO (JP)
HARAGUCHI KAZUTOSHI (JP)
HARAGUCHI KAZUTOSHI (JP)
Application Number:
PCT/JP2018/008088
Publication Date:
September 13, 2018
Filing Date:
March 02, 2018
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
UNIV NIHON (JP)
UNIV NIHON (JP)
International Classes:
C08L71/02; A61L31/14; B01J13/00; C08J3/075; C08K3/32; C08K3/34; C08K5/092
Domestic Patent References:
| WO2015068837A1 | 2015-05-14 | |||
| WO2011018995A1 | 2011-02-17 | |||
| WO2014046136A1 | 2014-03-27 |
Foreign References:
| JP2002053629A | 2002-02-19 | |||
| JP2010018665A | 2010-01-28 | |||
| JP2015040276A | 2015-03-02 | |||
| JP2008510004A | 2008-04-03 |
Other References:
SIMONA MORARIU ET AL.: "Effect of Temperature and Aging Time on the Rheological Behavior of Aqueous Poly(ethylene glycol)/Laponite RD Dispersions", THE JOURNAL OF PHYSICAL CHEMISTRY B, vol. 116, no. 1, 13 December 2011 (2011-12-13), pages 48 - 54, XP055555139, Retrieved from the Internet
JOURNAL OF PHYSICAL CHEMISTRY B, vol. 116, no. 1, 2012, pages 48 - 54
See also references of EP 3581620A4
JOURNAL OF PHYSICAL CHEMISTRY B, vol. 116, no. 1, 2012, pages 48 - 54
See also references of EP 3581620A4
Attorney, Agent or Firm:
HANABUSA PATENT & TRADEMARK OFFICE (JP)
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